Disintegrate asm/system.h for CRIS

Disintegrate asm/system.h for CRIS.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
cc: linux-cris-kernel@axis.com

8 files changed, 112 insertions, 92 deletions

diff --git a/arch/cris/include/asm/atomic.h b/arch/cris/include/asm/atomic.h
index bbf093814db2..1056a5dfe04f 100644
--- a/arch/cris/include/asm/atomic.h
+++ b/arch/cris/include/asm/atomic.h
@@ -5,7 +5,7 @@
 
 #include <linux/compiler.h>
 #include <linux/types.h>
-#include <asm/system.h>
+#include <asm/cmpxchg.h>
 #include <arch/atomic.h>
 
 /*
diff --git a/arch/cris/include/asm/barrier.h b/arch/cris/include/asm/barrier.h
new file mode 100644
index 000000000000..198ad7fa6b25
--- /dev/null
+++ b/arch/cris/include/asm/barrier.h
@@ -0,0 +1,25 @@
+#ifndef __ASM_CRIS_BARRIER_H
+#define __ASM_CRIS_BARRIER_H
+
+#define nop() __asm__ __volatile__ ("nop");
+
+#define barrier() __asm__ __volatile__("": : :"memory")
+#define mb() barrier()
+#define rmb() mb()
+#define wmb() mb()
+#define read_barrier_depends() do { } while(0)
+#define set_mb(var, value)  do { var = value; mb(); } while (0)
+
+#ifdef CONFIG_SMP
+#define smp_mb()        mb()
+#define smp_rmb()       rmb()
+#define smp_wmb()       wmb()
+#define smp_read_barrier_depends()     read_barrier_depends()
+#else
+#define smp_mb()        barrier()
+#define smp_rmb()       barrier()
+#define smp_wmb()       barrier()
+#define smp_read_barrier_depends()     do { } while(0)
+#endif
+
+#endif /* __ASM_CRIS_BARRIER_H */
diff --git a/arch/cris/include/asm/bitops.h b/arch/cris/include/asm/bitops.h
index a78a2d70cd8b..184066ceb1f6 100644
--- a/arch/cris/include/asm/bitops.h
+++ b/arch/cris/include/asm/bitops.h
@@ -19,7 +19,6 @@
 #endif
 
 #include <arch/bitops.h>
-#include <asm/system.h>
 #include <linux/atomic.h>
 #include <linux/compiler.h>
 
diff --git a/arch/cris/include/asm/cmpxchg.h b/arch/cris/include/asm/cmpxchg.h
new file mode 100644
index 000000000000..b756dac8aa3f
--- /dev/null
+++ b/arch/cris/include/asm/cmpxchg.h
@@ -0,0 +1,53 @@
+#ifndef __ASM_CRIS_CMPXCHG__
+#define __ASM_CRIS_CMPXCHG__
+
+#include <linux/irqflags.h>
+
+static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
+{
+  /* since Etrax doesn't have any atomic xchg instructions, we need to disable
+     irq's (if enabled) and do it with move.d's */
+  unsigned long flags,temp;
+  local_irq_save(flags); /* save flags, including irq enable bit and shut off irqs */
+  switch (size) {
+  case 1:
+    *((unsigned char *)&temp) = x;
+    x = *(unsigned char *)ptr;
+    *(unsigned char *)ptr = *((unsigned char *)&temp);
+    break;
+  case 2:
+    *((unsigned short *)&temp) = x;
+    x = *(unsigned short *)ptr;
+    *(unsigned short *)ptr = *((unsigned short *)&temp);
+    break;
+  case 4:
+    temp = x;
+    x = *(unsigned long *)ptr;
+    *(unsigned long *)ptr = temp;
+    break;
+  }
+  local_irq_restore(flags); /* restore irq enable bit */
+  return x;
+}
+
+#define xchg(ptr,x) \
+        ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+
+#define tas(ptr) (xchg((ptr),1))
+
+#include <asm-generic/cmpxchg-local.h>
+
+/*
+ * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
+ * them available.
+ */
+#define cmpxchg_local(ptr, o, n)                                               \
+        ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
+                        (unsigned long)(n), sizeof(*(ptr))))
+#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+
+#ifndef CONFIG_SMP
+#include <asm-generic/cmpxchg.h>
+#endif
+
+#endif /* __ASM_CRIS_CMPXCHG__ */
diff --git a/arch/cris/include/asm/exec.h b/arch/cris/include/asm/exec.h
new file mode 100644
index 000000000000..9665dab7e25b
--- /dev/null
+++ b/arch/cris/include/asm/exec.h
@@ -0,0 +1,6 @@
+#ifndef __ASM_CRIS_EXEC_H
+#define __ASM_CRIS_EXEC_H
+
+#define arch_align_stack(x) (x)
+
+#endif /* __ASM_CRIS_EXEC_H */
diff --git a/arch/cris/include/asm/processor.h b/arch/cris/include/asm/processor.h
index 3f7248f7a1c9..4210d72a6667 100644
--- a/arch/cris/include/asm/processor.h
+++ b/arch/cris/include/asm/processor.h
@@ -10,10 +10,10 @@
 #ifndef __ASM_CRIS_PROCESSOR_H
 #define __ASM_CRIS_PROCESSOR_H
 
-#include <asm/system.h>
 #include <asm/page.h>
 #include <asm/ptrace.h>
 #include <arch/processor.h>
+#include <arch/system.h>
 
 struct task_struct;
 
@@ -72,4 +72,13 @@ static inline void release_thread(struct task_struct *dead_task)
 
 #define cpu_relax()     barrier()
 
+/*
+ * disable hlt during certain critical i/o operations
+ */
+#define HAVE_DISABLE_HLT
+void disable_hlt(void);
+void enable_hlt(void);
+
+void default_idle(void);
+
 #endif /* __ASM_CRIS_PROCESSOR_H */
diff --git a/arch/cris/include/asm/switch_to.h b/arch/cris/include/asm/switch_to.h
new file mode 100644
index 000000000000..d842e1163ba1
--- /dev/null
+++ b/arch/cris/include/asm/switch_to.h
@@ -0,0 +1,12 @@
+#ifndef __ASM_CRIS_SWITCH_TO_H
+#define __ASM_CRIS_SWITCH_TO_H
+
+/* the switch_to macro calls resume, an asm function in entry.S which does the actual
+ * task switching.
+ */
+
+extern struct task_struct *resume(struct task_struct *prev, struct task_struct *next, int);
+#define switch_to(prev,next,last) last = resume(prev,next, \
+                                         (int)&((struct task_struct *)0)->thread)
+
+#endif /* __ASM_CRIS_SWITCH_TO_H */
diff --git a/arch/cris/include/asm/system.h b/arch/cris/include/asm/system.h
index ea10592f7d75..a7f40578587c 100644
--- a/arch/cris/include/asm/system.h
+++ b/arch/cris/include/asm/system.h
@@ -1,89 +1,5 @@
-#ifndef __ASM_CRIS_SYSTEM_H
-#define __ASM_CRIS_SYSTEM_H
-
-#include <linux/irqflags.h>
-#include <arch/system.h>
-
-/* the switch_to macro calls resume, an asm function in entry.S which does the actual
- * task switching.
- */
-
-extern struct task_struct *resume(struct task_struct *prev, struct task_struct *next, int);
-#define switch_to(prev,next,last) last = resume(prev,next, \
-                                         (int)&((struct task_struct *)0)->thread)
-
-#define barrier() __asm__ __volatile__("": : :"memory")
-#define mb() barrier()
-#define rmb() mb()
-#define wmb() mb()
-#define read_barrier_depends() do { } while(0)
-#define set_mb(var, value)  do { var = value; mb(); } while (0)
-
-#ifdef CONFIG_SMP
-#define smp_mb()        mb()
-#define smp_rmb()       rmb()
-#define smp_wmb()       wmb()
-#define smp_read_barrier_depends()     read_barrier_depends()
-#else
-#define smp_mb()        barrier()
-#define smp_rmb()       barrier()
-#define smp_wmb()       barrier()
-#define smp_read_barrier_depends()     do { } while(0)
-#endif
-
-#define iret()
-
-/*
- * disable hlt during certain critical i/o operations
- */
-#define HAVE_DISABLE_HLT
-void disable_hlt(void);
-void enable_hlt(void);
-
-static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
-{
-  /* since Etrax doesn't have any atomic xchg instructions, we need to disable
-     irq's (if enabled) and do it with move.d's */
-  unsigned long flags,temp;
-  local_irq_save(flags); /* save flags, including irq enable bit and shut off irqs */
-  switch (size) {
-  case 1:
-    *((unsigned char *)&temp) = x;
-    x = *(unsigned char *)ptr;
-    *(unsigned char *)ptr = *((unsigned char *)&temp);
-    break;
-  case 2:
-    *((unsigned short *)&temp) = x;
-    x = *(unsigned short *)ptr;
-    *(unsigned short *)ptr = *((unsigned short *)&temp);
-    break;
-  case 4:
-    temp = x;
-    x = *(unsigned long *)ptr;
-    *(unsigned long *)ptr = temp;
-    break;
-  }
-  local_irq_restore(flags); /* restore irq enable bit */
-  return x;
-}
-
-#include <asm-generic/cmpxchg-local.h>
-
-/*
- * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make
- * them available.
- */
-#define cmpxchg_local(ptr, o, n)                                               \
-        ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
-                        (unsigned long)(n), sizeof(*(ptr))))
-#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
-
-#ifndef CONFIG_SMP
-#include <asm-generic/cmpxchg.h>
-#endif
-
-#define arch_align_stack(x) (x)
-
-void default_idle(void);
-
-#endif
+/* FILE TO BE DELETED. DO NOT ADD STUFF HERE! */
+#include <asm/barrier.h>
+#include <asm/cmpxchg.h>
+#include <asm/exec.h>
+#include <asm/switch_to.h>